Qty one each, selling as a set for $25.00US. I have had them sine about 1993, bought in Canada for my AR-15 (which has long since been sold), and they were used then, but still if you want them, email me for a pic.
I also have three other rear sights, the same type with large appeture for $10.00US each or all three for $25.00US.
I'll throw in the shipping. Sent via AIR.